Ygtjki

How many wives did king shaul have

Does Dispel Magic work on Tiny Hut?

One verb to replace 'be a member of' a club

how do we prove that a sum of two periods is still a period?

Bullying boss launched a smear campaign and made me unemployable

Implication of namely

What's the meaning of "Sollensaussagen"?

OP Amp not amplifying audio signal

Finding the reason behind the value of the integral.

Why were 5.25" floppy drives cheaper than 8"?

What is the fastest integer factorization to break RSA?

What historical events would have to change in order to make 19th century "steampunk" technology possible?

How dangerous is XSS

How seriously should I take size and weight limits of hand luggage?

How do I exit BASH while loop using modulus operator?

What is the opposite of "eschatology"?

How to stretch the corners of this image so that it looks like a perfect rectangle?

Send out email when Apex Queueable fails and test it

How can saying a song's name be a copyright violation?

Can a virus destroy the BIOS of a modern computer?

Knowledge-based authentication using Domain-driven Design in C#

Avoiding the "not like other girls" trope?

How could indestructible materials be used in power generation?

What is the most common color to indicate the input-field is disabled?

REISUB Safe Shutdown

Have Sun keyboard moon key (116) not shut down my computerEnsure that loopback root and host are unmounted on shutdownUbuntu 12.04 / Elementary OS - Shutdown Problem / LogfilesGraceful shutdown in ArchLinuxWhy doesn't this sequence of keys, using SyRq, workHow to set up an emergency power-off keyboard shortcut on Linux?Processes blocking on shutdownShutdown seems to freeze my cpu on dell latitude e7470 under arch linux3 Questions about having to do a hard shutdown and rebootRunning script at shutdown and reboot to prevent chromium session loss

7

Is there a modified Alt + Sysrq + R + E + I + S + U + B which only shuts down the computer (without rebooting)?

There are days when the system is frozen and I'm too tired to debug the problem and might make it even worse if I tried to fix it in my drowsy state...

I tried Alt + Sysrq + R + E + I + S + O, but there is no effect after typing the sequence slowly (I repeated the sequence after a few seconds to confirm I did not mis-type).

After trying the above combination, I used the regular Alt + Sysrq + R + E + I + S + U + B which did work (rebooted).

I'm currently using force shutdown (ie. press and hold power button)

keyboard-shortcuts shutdown

share|improve this question

edited May 10 '17 at 8:41

terdon♦

133k33267446

asked Apr 21 '17 at 1:05

JAd4cuX6zrrPcF6JAd4cuX6zrrPcF6

361

bumped to the homepage by Community♦ 2 days ago

This question has answers that may be good or bad; the system has marked it active so that they can be reviewed.

• 
  
  
  

  
  5
  

  
  
  
  
  
  

  
  
  how about 'o' after the 's'? (or alt+sysrg+r,e,i,s,o), reference: en.wikipedia.org/wiki/Magic_SysRq_key
  
  – Theophrastus
  Apr 21 '17 at 1:19
  
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  @Theophrastus why not just make your comment an answer? It looks like that would be exactly what OP is looking for.
  
  – domsson
  Apr 23 '17 at 12:25
  

  
  
  
  

add a comment | 

7

Is there a modified Alt + Sysrq + R + E + I + S + U + B which only shuts down the computer (without rebooting)?

There are days when the system is frozen and I'm too tired to debug the problem and might make it even worse if I tried to fix it in my drowsy state...

I tried Alt + Sysrq + R + E + I + S + O, but there is no effect after typing the sequence slowly (I repeated the sequence after a few seconds to confirm I did not mis-type).

After trying the above combination, I used the regular Alt + Sysrq + R + E + I + S + U + B which did work (rebooted).

I'm currently using force shutdown (ie. press and hold power button)

keyboard-shortcuts shutdown

share|improve this question

edited May 10 '17 at 8:41

terdon♦

133k33267446

asked Apr 21 '17 at 1:05

JAd4cuX6zrrPcF6JAd4cuX6zrrPcF6

361

bumped to the homepage by Community♦ 2 days ago

This question has answers that may be good or bad; the system has marked it active so that they can be reviewed.

• 
  
  
  

  
  5
  

  
  
  
  
  
  

  
  
  how about 'o' after the 's'? (or alt+sysrg+r,e,i,s,o), reference: en.wikipedia.org/wiki/Magic_SysRq_key
  
  – Theophrastus
  Apr 21 '17 at 1:19
  
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  @Theophrastus why not just make your comment an answer? It looks like that would be exactly what OP is looking for.
  
  – domsson
  Apr 23 '17 at 12:25
  

  
  
  
  

add a comment | 

Is there a modified Alt + Sysrq + R + E + I + S + U + B which only shuts down the computer (without rebooting)?

There are days when the system is frozen and I'm too tired to debug the problem and might make it even worse if I tried to fix it in my drowsy state...

I tried Alt + Sysrq + R + E + I + S + O, but there is no effect after typing the sequence slowly (I repeated the sequence after a few seconds to confirm I did not mis-type).

After trying the above combination, I used the regular Alt + Sysrq + R + E + I + S + U + B which did work (rebooted).

I'm currently using force shutdown (ie. press and hold power button)

keyboard-shortcuts shutdown

share|improve this question

edited May 10 '17 at 8:41

terdon♦

133k33267446

asked Apr 21 '17 at 1:05

JAd4cuX6zrrPcF6JAd4cuX6zrrPcF6

361

share|improve this question

edited May 10 '17 at 8:41

terdon♦

133k33267446

asked Apr 21 '17 at 1:05

JAd4cuX6zrrPcF6JAd4cuX6zrrPcF6

361

share|improve this question

edited May 10 '17 at 8:41

terdon♦

133k33267446

asked Apr 21 '17 at 1:05

JAd4cuX6zrrPcF6JAd4cuX6zrrPcF6

361

edited May 10 '17 at 8:41

terdon♦

133k33267446

edited May 10 '17 at 8:41

terdon♦

133k33267446

asked Apr 21 '17 at 1:05

JAd4cuX6zrrPcF6JAd4cuX6zrrPcF6

361

asked Apr 21 '17 at 1:05

JAd4cuX6zrrPcF6JAd4cuX6zrrPcF6

361

1 Answer
1

active

oldest

votes

0

Unfortunately, the 'o' sysrq key doesn't always work. The reason for this is quite complicated, and often system-specific, but it boils down to the fact that it's pretty easy to trigger a system reset because doing so just involves pulling a single input on the CPU low (or triggering some internal reset circuitry in the CPU, for example by triple faulting on an x86 system), but actually powering off the system is often somewhat complicated, and usually requires calling into the system firmware, and isn't even supported by the kernel on all systems to begin with (many embedded systems may not have any way to actually power off completely, the Raspberry Pi is a good example).

As a result of this, there isn't really any portable way to power off a hung Linux system short of just manually cutting power like you are already.

share|improve this answer

answered Jul 13 '17 at 14:00

Austin HemmelgarnAustin Hemmelgarn

6,24111119

add a comment | 

Your Answer

StackExchange.ready(function()
var channelOptions =
tags: "".split(" "),
id: "106"
;
initTagRenderer("".split(" "), "".split(" "), channelOptions);

StackExchange.using("externalEditor", function()
// Have to fire editor after snippets, if snippets enabled
if (StackExchange.settings.snippets.snippetsEnabled)
StackExchange.using("snippets", function()
createEditor();
);

else
createEditor();

);

function createEditor()
StackExchange.prepareEditor(
heartbeatType: 'answer',
autoActivateHeartbeat: false,
convertImagesToLinks: false,
noModals: true,
showLowRepImageUploadWarning: true,
reputationToPostImages: null,
bindNavPrevention: true,
postfix: "",
imageUploader:
brandingHtml: "Powered by u003ca class="icon-imgur-white" href="https://imgur.com/"u003eu003c/au003e",
contentPolicyHtml: "User contributions licensed under u003ca href="https://creativecommons.org/licenses/by-sa/3.0/"u003ecc by-sa 3.0 with attribution requiredu003c/au003e u003ca href="https://stackoverflow.com/legal/content-policy"u003e(content policy)u003c/au003e",
allowUrls: true
,
onDemand: true,
discardSelector: ".discard-answer"
,immediatelyShowMarkdownHelp:true
);



);

draft saved

draft discarded

Sign up or log in

StackExchange.ready(function ()
StackExchange.helpers.onClickDraftSave('#login-link');
);

Sign up using Google

Sign up using Facebook

Sign up using Email and Password

Post as a guest

Name

Email

Required, but never shown

StackExchange.ready(
function ()
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2funix.stackexchange.com%2fquestions%2f360330%2freisub-safe-shutdown%23new-answer', 'question_page');

);

Post as a guest

Name

Email

Required, but never shown

0

Unfortunately, the 'o' sysrq key doesn't always work. The reason for this is quite complicated, and often system-specific, but it boils down to the fact that it's pretty easy to trigger a system reset because doing so just involves pulling a single input on the CPU low (or triggering some internal reset circuitry in the CPU, for example by triple faulting on an x86 system), but actually powering off the system is often somewhat complicated, and usually requires calling into the system firmware, and isn't even supported by the kernel on all systems to begin with (many embedded systems may not have any way to actually power off completely, the Raspberry Pi is a good example).

As a result of this, there isn't really any portable way to power off a hung Linux system short of just manually cutting power like you are already.

share|improve this answer

answered Jul 13 '17 at 14:00

Austin HemmelgarnAustin Hemmelgarn

6,24111119

add a comment | 

0

Unfortunately, the 'o' sysrq key doesn't always work. The reason for this is quite complicated, and often system-specific, but it boils down to the fact that it's pretty easy to trigger a system reset because doing so just involves pulling a single input on the CPU low (or triggering some internal reset circuitry in the CPU, for example by triple faulting on an x86 system), but actually powering off the system is often somewhat complicated, and usually requires calling into the system firmware, and isn't even supported by the kernel on all systems to begin with (many embedded systems may not have any way to actually power off completely, the Raspberry Pi is a good example).

As a result of this, there isn't really any portable way to power off a hung Linux system short of just manually cutting power like you are already.

share|improve this answer

answered Jul 13 '17 at 14:00

Austin HemmelgarnAustin Hemmelgarn

6,24111119

add a comment | 

Unfortunately, the 'o' sysrq key doesn't always work. The reason for this is quite complicated, and often system-specific, but it boils down to the fact that it's pretty easy to trigger a system reset because doing so just involves pulling a single input on the CPU low (or triggering some internal reset circuitry in the CPU, for example by triple faulting on an x86 system), but actually powering off the system is often somewhat complicated, and usually requires calling into the system firmware, and isn't even supported by the kernel on all systems to begin with (many embedded systems may not have any way to actually power off completely, the Raspberry Pi is a good example).

As a result of this, there isn't really any portable way to power off a hung Linux system short of just manually cutting power like you are already.

share|improve this answer

answered Jul 13 '17 at 14:00

Austin HemmelgarnAustin Hemmelgarn

6,24111119

share|improve this answer

answered Jul 13 '17 at 14:00

Austin HemmelgarnAustin Hemmelgarn

6,24111119

answered Jul 13 '17 at 14:00

Austin HemmelgarnAustin Hemmelgarn

6,24111119

answered Jul 13 '17 at 14:00

Austin HemmelgarnAustin Hemmelgarn

6,24111119